1
: a gelatinous or mucinous substance found normally in the thyroid and also in diseased tissue
2
a
: a substance that consists of particles dispersed throughout another substance which are too small for resolution (see resolution sense 6a) with an ordinary light microscope but are incapable of passing through a semipermeable membrane
b
: a mixture consisting of a colloid together with the medium in which it is dispersed
smoke is a colloid
colloidally
adverb
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Merriam-Webster unabridged
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